Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm are stored into an enclosure. When a servo track write operation is conducted, the enclosure interior is depressurized to an atmospheric pressure lower than normal pressure and then servo data is recorded on the disk.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A manufacturing method for a disk drive, comprising: storing, into an enclosure, a disk, a magnetic head slider with a magnetic head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm; depressurizing the inside of the enclosure to an atmospheric pressure lower than normal atmospheric pressure; and recording servo data on the disk.
2. The manufacturing method for a disk drive according to claim 1 , wherein the inside of the enclosure is depressurized to an atmospheric pressure lower than normal atmospheric pressure, by housing the enclosure in a chamber pre-depressurized to an atmospheric pressure lower than normal atmospheric pressure.
3. The manufacturing method for a disk drive according to claim 1 , wherein the inside of the enclosure is depressurized to an atmospheric pressure lower than normal atmospheric pressure, by suctioning an internal gas from a particle test hole provided in the enclosure.
4. The manufacturing method for a disk drive according to claim 1 , wherein self-servo track writing is used to record servo data on the disk.
5. The manufacturing method for a disk drive according to claim 1 , wherein the magnetic head slider has an air-bearing surface comprising: a leading side air-bearing surface formed in a longitudinal direction of the slider from a leading edge; a first stepped surface formed on the leading side air-bearing surface, the first stepped surface having a first shoulder with respect to the leading side air-bearing surface; and a second stepped surface formed on the first stepped surface, the second stepped surface having a second shoulder with respect to the first stepped surface; wherein the magnetic head slider operates to record servo data on the disk.
6. The manufacturing method for a disk drive according to claim 1 , wherein the magnetic head slider has an air-bearing surface comprising: one or plural leading rail surfaces; a trailing rail surface with approximately the same height as the height of each of the leading rail surfaces, the trailing rail surface having the magnetic head provided thereon; a leading side air-bearing surface having a required depth of D 1 with respect to each leading rail surface and to the trailing rail surface; a negative-pressure grooved surface with an even greater depth of D 2 with respect to the leading side air-bearing surface; and a stepped upper surface having continuity in a direction from the leading edge toward a trailing edge, the stepped upper surface being formed in a region including at least one portion of each of the leading rail surfaces, with a required height above each thereof; wherein said leading side air-bearing surface and each of said leading rail surfaces are formed between said leading edge and said stepped upper surface; and wherein the magnetic head slider operates to record servo data on the disk.
7. A servo track writer comprising: a magnetic head slider with a magnetic head for recording servo data on a disk; a suspension configured to retain said magnetic head slider; an arm configured to support said suspension; and a driving section configured to drive said arm; wherein said magnetic head slider is constructed so that a difference between a slider-to-disk clearance under a state depressurized to a required pressure lower than normal atmospheric pressure, and a slider-to-disk clearance under normal atmospheric pressure, is equal to or less than about 10% of the slider-to-disk clearance under normal atmospheric pressure.
8. The servo track writer according to claim 7 , wherein said magnetic head slider is constructed so that a maximum slider-to-disk clearance under the state depressurized to the required pressure is about 0.5 nm smaller than the slider-to-disk clearance under normal atmospheric pressure.
9. The servo track writer according to claim 7 , wherein said magnetic head slider has an air-bearing surface comprising: a leading side air-bearing surface formed in a longitudinal direction of the slider from a leading edge; a first stepped surface formed on the leading side air-bearing surface, the first stepped surface having a first shoulder with respect to the leading side air-bearing surface; and a second stepped surface formed on the first stepped surface, the second stepped surface having a second shoulder with respect to the first stepped surface.
10. The servo track writer according to claim 7 , wherein said magnetic head slider has an air-bearing surface comprising: one or plural leading rail surfaces; a trailing rail surface with approximately the same height as the height of each of the leading rail surfaces, the trailing rail surface having the magnetic head provided thereon; a leading side air-bearing surface having a required depth of D 1 with respect to each leading rail surface and to the trailing rail surface; a negative-pressure grooved surface with an even greater depth of D 2 with respect to the leading side air-bearing surface; and a stepped upper surface having continuity in a direction from the leading edge toward a trailing edge, the stepped upper surface being formed in a region including at least one portion of each of the leading rail surfaces, with a required height above each thereof; wherein said leading side air-bearing surface and each of said leading rail surfaces are formed between said leading edge and said stepped upper surface.
11. A magnetic disk drive, comprising: a disk; a magnetic head slider with a magnetic head for recording servo data on said disk; a suspension configured to retain said magnetic head slider; an arm configured to support said suspension; and a driving section configured to drive said arm; wherein said magnetic head slider is constructed so that a difference between a slider-to-disk clearance during self-servo track writing under a state depressurized to a required pressure lower than normal atmospheric pressure, and a slider-to-disk clearance under normal atmospheric pressure, is equal to or less than about 10% of the slider-to-disk clearance under normal atmospheric pressure.
12. The servo track writer according to claim 11 , wherein said magnetic head slider is constructed so that a maximum slider-to-disk clearance under the state depressurized to the required pressure is about 0.5 nm smaller than the slider-to-disk clearance under normal atmospheric pressure.
13. The servo track writer according to claim 11 , wherein said magnetic head slider has an air-bearing surface comprising: a leading side air-bearing surface formed in a longitudinal direction of the slider from a leading edge; a first stepped surface formed on the leading side air-bearing surface, the first stepped surface having a first shoulder with respect to the leading side air-bearing surface; and a second stepped surface formed on the first stepped surface, the second stepped surface having a second shoulder with respect to the first stepped surface.
14. The servo track writer according to claim 11 , wherein said magnetic head slider has an air-bearing surface comprising: one or plural leading rail surfaces; a trailing rail surface with approximately the same height as the height of each of the leading rail surfaces, the trailing rail surface having the magnetic head provided thereon; a leading side air-bearing surface having a required depth of D 1 with respect to each leading rail surface and to the trailing rail surface; a negative-pressure grooved surface with an even greater depth of D 2 with respect to the leading side air-bearing surface; and a stepped upper surface having continuity in a direction from the leading edge toward a trailing edge, the stepped upper surface being formed in a region including at least one portion of each of the leading rail surfaces, with a required height above each thereof; wherein said leading side air-bearing surface and each of said leading rail surfaces are formed between said leading edge and said stepped upper surface.
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January 25, 2006
October 9, 2007
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